Padlock



Aug.` 7, 1923. l 1,464,194

D. BARTOLACELLI PADLOCK Patented Aug. 7, i923.

ll N l l DELINLDO BARTOLACELLI, F DALY CITY, CALIFORNA.

PADLOGK.

Application led .May 2,

To all ywhom 'it 'may concern:

Be it known that l, DnLrNno- BARTOLA- cnLLr, a subject oi' the King ofItaly7 re` siding at Daly City, in the county of San Mateo and State oi'California, have invented new and useful Improvements in a`d-vr locks,of which the following is a specification.

llhis invention relates to aypadlock and has for its primary object toprovide an improved construction; combination and arrangement of partsin a device of this character whereby the same may beseeurely; held in alockedposition until released byv the particular key fitting it.

.Another object oi" this invention. is to provide an improved meanswhich permits the locking ot the padlock without the insertion of thekey therein, thereby preventing it from being unlocked with any deviceother than the particular key `made to lit the parts thereof.

@ther and further obj ects, including, cer-` tain features ofconstruction will appear in the specilication and be pointed out in theappended claim, reference being had to the accompanying drawings whichshow the preferred embodiments of myy invention and in which* Fig. 1 isa side elevation oi' the padlock showing the same in a locked position;y

F ig. 2 is a side elevation of the key 'for the padlock;

Fig. 3 is a sectional view of the key in an operative position; n

Fig. l is an edge view ol? the key;

Fig. 5 is a detail sectional view of the padlock taken on the line 5--6of Fig showing the same in a locked position with one of its sidesremoved; l

Fig. 6 is a view similar to Fi 5 taken on the line 5 6 of Fig. 8 showingthe padlock in an unlocked position with one of its sides removed;

Fig. 7 is a vertical cross section on the line 7-7 `of Fig. 6;

Fig. 8 is a transverse section on the line 8-8 of Fig. 6;

Fig. 9 is a vertical transverse section on line 99 of Fig. 6.

ln the embodiment o f my invention shown onthe drawings, vthe mainstruc-ture consists of a casing 1, into which the working parts of thelock are embodied, and into two round holes 3, provided in the topthereof, the ends of the securing bow 2 are in- Serial No. 557,843.

serted. One end of securingbow 2 extends through the top of the casing 1and inside thereo'r', and is encircledwithin the casingy by a spiralspring a, one end of which spring bears against the shoulder 5 of bow 2and theother end of which bears against the upper surface of flange 6.Flange 6` is securely attached by screws or rivets to the inner surfaceof casing 1; and is provided with a circular hole into which one end ofbow 2 is inserted. Flange 6 serves both as a pivot for the movement ofbow 2, backward and forward and as a means for preventingI the movementof spring l downward on bow 2. Shoulder 5, which is secured on bow 2,enables the spiral spring 4l to project kbow 2 out of casing 1 when thesame is unlocked, as well as a means. for preventing the bow 2 frombeing removed entirely from the top of the casing when the padlock is inan unlocked position. Secured loosely to the in side of casing l, justunder the top thereof, by means of screws 11 and 12 is the locking means7 one end of which is provided with a circular ring 8, which engages inslot il when the device is locked. rlhe other end of locking means 7 isprovided with a flat llanged projection 9; which engages with slot 10 inbow 2 when the same is in a locked position. To the central portion oflocking means 7 is attached a pin 13 which extends outwardly throughslots in ktumblers 14. lhrough the end of pin13 is inserted a smallcotter pin 13a which holds the tumblers :tirmly together and against thelocking means 7. Screw 12 extends throughv one end `of tumblers 14, andserves as a pivot `for their movement when the key is beine operatedagainst their inside surfaces. To one end of each. of the tumblers 14eis securely attached steel springs 15 which is also securely attached tothe projection on casing l, which said steel springs tend to hold thetumblers downward when the key is not being operated against them.Attached to locking means 7 is one end ot' spiral wire spring 16, and tothe top of casing 1 the other end thereof is attached. The said spring16 tends at all times to hold the locking means 7 in a locked position,and only by exerting a pulling force thereon by attached to the 'insideof casing 1fby means of screws 18 and 19. Screw 192L extends through oneend of tumblers 20, and tends to hold them firmly together as well asagainst the surface of locking means 17. The said screw 19 serves alsoas a pivot around which the said tumblers mo-ve when the key is beingoperated. To the central portion of locking means 17 is attached a pin21 which extends outwardly through the slots' 22V in the center oftumblers 20. Through the end of pin 21 is inserted a small cotter pin21a which holds the tumblers firmly together on pin 21. To the end ofeach of the tumblers 20 is securely attached a steel springr23 which isalso secured to a projection on casing 1, and which, tends to hold thetumblers inwardly when the key is not being operated against them. rlheend of locking means `17, nearest the bow 2 .is provided with aprojection 2li which fits into slot' 25 on the end of bow 2, when in alocked position. To a projection on locking means 17 is attached aspiral wire spring 16 similar to `the other spiral wire spring 16, whichfunctions in the same manner in connection with the locking means 17, asdoes spring 16 function with locking means 7. Through the center ofcasing 1 is a circular hole through which a circular key block 26 isinserted, and loosely fitted at its circumferential edges so as toprovide for a ci reular motion inside of said casing 7. rThe said blockextends through one side of the casing to 'the inside surface of theother side thereof, and moves freely therein. Through the center of keyblock 26, is a slot 27 which extends entirely through the same and intowhich the key 28 is inserted. Extending through theV sides of key block26 and parallel to the slot 27 are apertures 30 through which the twounlocking' means 29 are permitted to project. The key 28 is providedwith a hollow handle 31 through which a pin 32`is inserted. One endofpin 32 is provided With a finger piece 83 and the other end thereof isprovided with teeth which engage with! similar teeth on the inside endof unlocking means 29. Encircling the pin 32 is a spiral wire spring-84Cwhich tends to hold the pin 32 upward, by reason of the fact that oneend of the said spring bears against the shoulder of the pin 32 whilethe other end thereof bears against a projection on the inside of handle31. The two unlocking means 29 are pivoted within the key 28 on. pins35, and are securely held therein by said pins. The padlock casing isma'de in two sections, one a main structure to which the various screwsand securing pins are secured and the other, a cover, which entirelyencases the working parts and holds Vthe key block firmly therein.

Having explained the various parts of construction I will now endeavorto explain the method in which they function in reference to each other.

Assuming that the padlock is in a locked position and that it is desiredto be opened, the key 28 is inserted within the slot 27 of keyblock 26,and the finger piece 33 of said key is pressed toufard the lock. As thepin 32 moves inwardly the teeth thereof being engaged with the teeth ofthe unlocking means 29, the said unlocking means 29 mov ing on itspivots 35, move to al horizontal position through the apertures 30 ofkey block 26.- Vhile still holding the said finger piece in a downwardposition, the han-` dle 31 is turned toward the right. As the saidhandle is turned as aforesaid the key block 26 together with theunlocking means 29 are likewise turned until the eXtreme ends of saidunlocking means 29 come in contact withtumblers 14 and 20; As the saidunlocking means 29 continue to move as aforesaid, the said tumblersare'pressed outwardly and the said unlocking means 29 are allowed tocome in contact with each of the two projections of locking means 7 and17. By still turning the said handle 31 as aforesaid, the unlockingmeans 29 force the said locking means 7 and 17 away: from the slots 25,1() and 10'L1 and allow the spiral spring 4 which presses againstshoulder 5, to force the bow 2 upward in an unlocked position as shownin F ig. 6; After the said locking means 7 and 17 have been disengagedfrom' the said slots in bow 2, the key 28 maybe removed froml the keyblock 26, by releasing the finger piece 33. As the said finger piece 33is released, the spiral spring 34 encircling pin 32, forces said pinoutwardly and the engaged teeth in-unlock-ing lmeans 29 and at the endof pinf 32 arevturned untill the said unlocking means 29 are insidetliekey 2S, as shown in Fig. 2. vWhen it is desired to lock the device thebow 2is pressed inwardly until the circular ring 8 of the locking means7 the flanged projection 9, of said locking means and the fiangedprojection 2a of locking means 17 comefin't'o contact respectively, withthe slots 102.1() and 25 of the bow 2. As thesaidl projections and saidring come into contact with the. said slots of the bow 2, the spiralsprings 16 as'- sociated with the locking means`7 and 17, pullingsaidlocking means against thefsaid 'bow, ycause the said projectionsthereofto become firmly engaged with? the slotsin the bow 2, thus securelylocking the device,l and` holding it in a locked position.

lVhile I have shown and described the preferred embodiment of myinvention,ob viously various modifications may made within the spirit ofthe appended claim.

I claim: In a padlock, a casing, a' key block eX- tending through saidcasing, a slot-in said key block for the'insertion of a' key therein,

a pair of apertures in said key block for the emission of a pair ofunlocking means of said key, two sets of tumbleis for the engagement ofsaid unlocking means therewith, a pair of locking means associated withsaid tumble-rs, a bow, the ends of which enter within the saidcasng,three slots within said bow for' engagement with said pair oflocking means, a spring attached to each locking means for pulling itinto engagement with said bow, and a spiral spring encircling said bow,for forcing the slots thereof away from said locking means afterdisenga-gement therewith.

DELINDO BARTOLACELLI.

